title: Helicobacter suis KB1 derived from pig gastric lymphoid follicles induces the formation of gastric lymphoid follicles in mice through the activation of B cells and CD4 positive cells.
abstract: "Helicobacter heilmannii" ("H. heilmannii"), which belongs to the genus Helicobacter, is a group of bacterial species that display a long spiral-shaped morphology. Recent studies have demonstrated that "H. heilmannii" type 1 is actually H. suis, which mainly colonizes the stomachs of various animals and humans. However, the influence of H. suis on gastric diseases remains to be fully elucidated. In this report, we revealed the relationship between natural H. suis infection and follicular gastritis in the pig stomachs. From sequence analysis of the 16S rRNA, urease A, and urease B genes, the presence of H. suis was confirmed in pig gastric lymphoid follicles, and this bacterium was named H. suis KB1. In addition, H. suis KB1 was inoculated into C57BL/6J mice, and the following mouse model of the pathogenesis of follicular gastritis by H. suis infection was established: H. suis KB1 colonizes the mouse stomach, and moreover, induces the development of lymphoid follicles and acquired immune responses characterized by the activation of B cells and CD4 positive cells. These results may lead to better understanding of the relationship between H. suis and gastric diseases, especially follicular gastritis; and furthermore, our findings emphasize the zoonotic aspects of animal-human infection by H. suis.
authors.affiliation: Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Yamamoto
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Tanaka
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Nishitani
authors.forename: Shin
authors.initials: S
authors.lastname: Nishiumi
authors.forename: Ikuya
authors.initials: I
authors.lastname: Miki
authors.forename: Mamoru
authors.initials: M
authors.lastname: Takenaka
authors.forename: Kentaro
authors.initials: K
authors.lastname: Nobutani
authors.forename: Takuya
authors.initials: T
authors.lastname: Mimura
authors.forename: Yahaya
authors.initials: Y
authors.lastname: Ben Suleiman
authors.forename: Shigeto
authors.initials: S
authors.lastname: Mizuno
authors.forename: Mikihiko
authors.initials: M
authors.lastname: Kawai
authors.forename: Ikuo
authors.initials: I
authors.lastname: Uchiyama
authors.forename: Masaru
authors.initials: M
authors.lastname: Yoshida
authors.forename: Takeshi
authors.initials: T
authors.lastname: Azuma
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology*; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology*; D004269:DNA, Bacterial / Q000235:genetics; D005260:Female; D005753:Gastric Mucosa / Q000276:immunology* / Q000382:microbiology / Q000473:pathology; D005756:Gastritis / Q000276:immunology / Q000382:microbiology / Q000473:pathology; D005798:Genes, Bacterial; D016481:Helicobacter Infections / Q000276:immunology* / Q000382:microbiology; D018247:Helicobacter heilmannii / Q000235:genetics / Q000276:immunology* / Q000302:isolation & purification; D008221:Lymphoid Tissue / Q000276:immunology* / Q000382:microbiology / Q000473:pathology; D051379:Mice; D008810:Mice, Inbred C57BL; D008969:Molecular Sequence Data; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D013552:Swine; D014510:Urease / Q000032:analysis / Q000235:genetics
chemical_list: D004269:DNA, Bacterial; D012336:RNA, Ribosomal, 16S; D014510:Urease